New
welcome, they are pretty well built car, i have 90k on mine right now daily drive it for work and only issues ive ever had were the porus block issue but your at 77k so not saying your out of the woods but your chances of having a bad block are very slim. when you take it for a ride make sure the turbo doesnt make any weird noises as well. check and see if it has the gm stage one sensors on the intake maifold they will be black and blue if you so you have a gms1 balt and 3 bar map sensors! but other then that dont check the ebrake cause they are junk to begin with haha and check for any dents, major scratches and such other then that youll be good to go.
Not really if you are going to stay in stock form. If you plan to do a turbo swap like a ZFR or something then it would be nice to have them if you plan to run high boost.


